Definition: The term "Balamuthiidae" refers to a family of small, arthropod crustaceans that belong to the order Crustacea and are commonly known as baleen whales or shellfish. These animals are characterized by their small size, which makes them ideal for living in low-light conditions, such as in the depths of the ocean. Balamuthiidae are divided into three main groups: Balaenoptera, Balaenopterales,